Improvement in steam-generators



w. c. BAKER'.` j.

Steam-Generators.

N0. 144,04] Patented 0ct.28,1873.

UNITED STATES PATENT ITEICE.

WILLIAM C. BAKER, OF NEW' YORK, N. Y.

IMPROVEMENT IN STEAM-GENERATORS.

Specification forming part of Letters Patent No. 144,047, dated October 28,1873; application tiled July 3, 1873.

To all whom it may concern:

Beit known that I, WILLIAM C. BAKER, of the city and State of New York, have invented an Improvementin Steam-Generators, of which the following is a specification:

Steam-generators have heretofore been made with special reference to producing steam for heating purposes; and in apparatus of this character the water has circulated through coils of pipe in the lire-chamber, as may be seen in Letters Patent granted to me, No. 40,722 and 60,459.

My present invention is an improvement upon the aforesaid steam-generators, and is made with reference to promoting greater rapidity of circulation, increasing the heatingsurface, promoting combustion, and allowing the steam to separate more easily from the circulating water.

In the drawing, Figure 1 is a section longitudinally of the apparatus 5 and Fig. 2 is a plan, partially in section.

-, The steam-drums c are set at a slight inclination, and from the lower ends the descending tubes b connect with the transverse circulation and return or feed-water pipe c; and from this pipe c the pipes d rise and extend to the coil or coils e, that are within the fire-chamber, and connect at their upper ends with the lower portions of the drums a c. The fire-chamber is inclosed by the walls g, and provided with doors h and grate-bars k, and the products of combustion pass away beneath the drums c by the fine m.

The ashpit n may be divided into two parts by the wall o, and there are separate doors, so that the atmosphere may be admitted into either or both ash-pits.

There is a bar, r, that also separates the firechambers5 it is above the wall, and upon it the coils c rest; and this bar r is hollow, and opens at one end through the wall of the furnace, and at the other end said bar opens either into the furnace or into a flue in the brickwork, so that the external atmosphere is drawn through the saine to lessen its temperature and diminish the risk of burning out.

There may be a lire in either or both sides of the fire-chamber, as the fuel is separated by the bar r, and the atmosphere can be admitted to either or both of the ash-pits.

It will now be understood that the water circulates upwardly through the coil or coils in the re-chamber and enters the water and steam drum c, where there is ample space for the steam to separate and pass oft', and the water circulates downwardly to the lowest the tire is not obstructed by the coils. The` fire-space between the pipes in the coil is large in proportion to the size of pipe-w-that is to say, the distance between one pipe and the next Inust be about twice the diameter of the pi pe-so that the pipes containing the circulating water will not cool the air-chamber and prevent a perfect combustion ofthe fuel. B y maintaining these proportions the greatest possible benelit will be obtained from the fuel, because perfection in the combustion prevents waste of fuel, and the greatest rapidity of circulation possible is obtained by the action of the heat, thereby securing great economy of fuel and rapidity of action in the bo'rler.

I claim as my inventionl. The arrangement of the water and steam drums, circulating-pipes b, feed-water and circulating pipe c, pipe d, and coil c within the ireehamber, and connecting with the drum c, substantially as and for the purposes set forth.

2. The Hollow bar r, through which the at mosphere passes, and which separates the firespace and rests upon the division-wall o ofthe ash-pit u, in combination with the circulatingcoil e, that rests upon said bar r, and is connected with the water and steam drum, substantially as and for the purposes set forth.

Signed by me this 27th day of June, A. D.

W. C. BAKER.

Witnesses:

GEO. D. WALKER, GEO. T. PINCKNEY. 

